Roller side bearing.



I J. M00. COLEMAN.

ROLLER SIDE BEARING. APPLICATION FILED MAY 5, 1909.

' Patented Oct. 5, 1909.

I Fig.1.

Inventor.

C'olemn Witnesses,

JAMES McdUTCHEON COLEMAN, OF ST. LAMBERT, QUEBEC, CANADA.

ROLLER SIDE BEARING.

Specification of Letters Patent.

Patented Oct. 5, 190a.

' Application filed May 5, 1909. Serial No. 434,157.

I To all whom it may concern:

Commemresident of the town of St.Lambert,

111 the Province of Quebec, in the Dominion of Canada, a citizen oftheUnited States of America, have invented certain new and usefulImprovements in Roller Side Bearings; and I do hereby declare that thefollowing is a full, clear, and exact description of the same. g

The invention relates to improvements in roller side bearings, asdescribed in the pres" ent specification and illustrated in theaccompanying drawings that form part of the same.

The invention'consists essentially of the novel construction andarrangement of parts whereby the roller of the bearing autom aticallycenters itself at theraising of the car body by means of amemberindependent of the casing.

The objects of the invention are to devise a roller side bearing inrailway car construction which willrelieve the grind incident to platebearings and always return to position for rolling immediately on therelease;

of pressure and enerally to provide a simple, cheap and e 'ectivebearing.

In the drawings, Figure l is a longitudinal sectional view of the deviceshowing it secured to a bar bolster and the roller engaging the platebearing the truck. Fig. 2

is an enlarged sectional perspective view showing. the cover broken awayto disclose the interior. Fig. 3 is an enlarged cross sectional view.

Like numerals of reference indicate corresponding parts in each figure.

Referring to the drawings, 1 are the sides of the casing, 2 the ends, 3the flanges extending from said ends, and & ledges extending inwardlyfrom the bottom of said sides, said ledges and sides being formedunderneath in arc-shape longitudinally.

5 are arc-shaped slots centrally arranged opposite one to the other inthe ledges 4c. 6 is a rocker having correspondingly arcshaped bossesextending into the arc-shaped slots 5, said rocker being formed of sides7 and the ends 8 and rocking within said casing on said ledges. Thesides of said rocker-are inverted V shape to form the track 9.- v -l Qfis a roller having the trunnions ll having reduced portions and adaptedto travel on the track 9.

12 is the cover of the casing resting on the flanges 3 and sides 1. 13are springs secured tothe underside of said cover adjacent to the innerend walls and engaging the ends 8 of the rocker 6.

14 are bolts securing. the parts together and to the bolster of the car.

15 is the plate secured to the truck of the car and on which said roller10 travels.

In the operation of this device, the body of the car swinging from sideto side, as it constantly does in going around curves or from any otherdisturbance, comes in contactwith the top of the truck where heretoforeother forms of plate and roller bearings have been used. The rollerbearing secured to the bolster comes in contact with the plate of thetruck with the consequence that the said roller rolls to the limit ofits travel in the opening through the bottom of the casing, that is tosay, the roller rolls from the center to one or other of the ends of thecasing.

It is necessary in the furtheroperation of this device to bring theroller to the center of the casing after the release of pressure fromabove and in order to do this, there must be an inclined track withinthe casing, so that the roller will come back, this inclined track isprovided by the rocker 6, which is controlled by the springs 13, forwhen the roller rolls to one end of the casing, the spring at one end iscompressed by an end 8 of said rocker, but immediately .the pressure onthe roller is released by the raising of the'car-body, the spring whichhas been compressed forces that end of the rocker to its normal positionwith the result .that the roller being quite free, runs back to itscentral position without interference. In other words, the rocker whenno pressure is brought on the roller is always retained in its balancedposition by the springs 13.

It will be noticed that the roller continuously travels in the sameplane as long as pressure is relieved therefrom, and a very smallfraction of an inch play is necessary to bring the roller into servicefor the support of the car body and in returning the said roller tocenter, it does not make any difference what cant the car body has, forthe rocker will bring it back no matter what the position of the casingmay be, and this, as

far as I am'aware, is not so with any other v having rocker shaped sidebars, a roller having trunnions traveling on said side bars, a casingadapted to contain and support said rocker frame, and means forresiliently holding said frame in a balanced position.

2. In a roller side bearing, a casing open at" the bottom and havingsupports extending inwardly from the sides adjacent to said bottom, arectangular open frame in rocker form adapted to rock on said supports,a roller having trunnions traveling on the side bars of said frame, acover closing in the top of said casing and resilient means secured tosaid cover and engaging the end bars ofsaid open frame.

In a roller side bearing,a casing adapted to be secured to the bolsterof a car body, a roller having suitable trunnions and normally extendingthrough the open bottom of said casing, rocker arms forming tracks forsaid trunnions and suitably supported and held to a balanced positionWithin said casing, and a plate on the truck bolster below said roller.

a. In a roller side bearing, a casing having ledges extending inwardlyfrom the bottom of its sides, a rocker having ends and sides, the latterrocking on said ledges and being formed in inverted V-shape, a rollerhaving bearings extending centrally from the sides thereof and travelingon tracks foisned by'said sides of the rocker, a cover closing in saidcasing and springs secured to said cover and engaging the ends of saidrocker.

Signed at the city and district of Montreal, Quebec, Canada this 27thday of April, 1909.

JAMES nccarcrmor COLEMAN.

Witnesses G. H. Tnnslnnnn, 1. SHEE.

